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02-16-2023

judgejohnmd

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WHAT IS THIS

What is the purpose of this? What effect does rotating the *** have, if any? 97 4.0.
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Judgejohnmd

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02-16-2023

Fordzilla80

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That's the idle air control valve, which controls the airflow around the throttle butterfly when it's in the closed position (idle).

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02-16-2023

judgejohnmd

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Does turning the **** have any effect on the operation of the engine?

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02-16-2023

Fordzilla80

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No, it is like a vent. If you remove the black cap, there is a tiny filter underneath it. It does not affect the operation of the engine or IAC. It was removed from later versions.

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02-19-2023

Glaze77

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I turned my **** quarter turn and got like 3 feet of air.

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